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Date: Sun, 17 Jan 1999 15:54:04 +0100
From: Ingemar Lundgren <ingemar.lundgren@mb*.sw*.se*>
To: Capt JT <captjt@mi*.co*>
CC: techdiver@aquanaut.com
Subject: Re: Wreck diving deco practises

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Capt JT wrote:

> >Thae way i deco when diving wrecks is this:  First of all we never dive on
> >the anchor line because it can pull off. We have always got a separate line
> >to the wreck that we do the descent/ascent from. This way we can never lose
> >the line.  This line is placed at a spot where it is easy to locate for
> >example on the port side of the bridge.
>
> Ok who is the lucky one that free dives on scuba down on a new wreck that
> is 300 to 400ft and finds this great spot for your ascent line then sends
> it up.Add current and low vis you get one XXXX up diver.
>

Ok Mr Messersmith.  The line i am talking about is a shotline with a heavy
weight.  The divers goes down cuts the line from the weight and tie off to the
wreck. Really complicated is it not!  I am sure diving the anchor line is much
better?.  If you can not see the advantage with a separate ascent line you are
clearly stupid.

> >If  we cant find the line (which has never happened) we inflate the bag
> >approaching the first stop and lock the reel. Note that we do not tie off
> >the reel line to the wreck.  When the bag hits the surface it will be in the
> >area directly over  the wreck and the crew will spot it.  If the boat is
> >anchored the crew will simply put a buoy on the anchor line and drop it and
> >then start to chase the lift bag.
>
> Ok you lose the anchor and send up your bag ,the boat puts a buoy on the
> anchor and chases the free drifting diver.The free drifting divers buddy
> did not get lost or there is another team down that did not get lost ,you
> now have divers decoing on a permanent line to the wreck while the boat
> goes after the lone dumb ass.YOU NOW HAVE DIVERS WITH NO SURFACE SUPPORT
>
> >No risk at all of losing the line because we do not dive on the anchor line.
>
> No risk you say what about the ones that are left on the wreck? Who is
> going to help them should they need it if the boat is gone.
> Do you really think this is a good way?Enlighten me Please.



If there is current we have a second boat, a rib.  We almost never have currents
where i dive but when we do we use a second boat.  I do not dive in  Jeresy and
i
am not trying to tell anybody how to dive in your area. I am just telling you
how
we dive in our conditions.
The risk of not finding our line is almost non exsitant as it is placed on a
good
spot. All the wrecks that are deep that we dive are intact. If we place the line
on the bow for example how are you going to miss the line?  It is pretty basic
to
find the bow on the ship is it not?  Infact in thosands of dives we have never
missed the line.  If we would miss the line we got it coverd with chase boats on
the surface.  I think this is a method that works good and it has for years.
Maybee it would not work in your area and i really do not care either.
Could you tell me if diving a 400 feet deep wreck how much of the 1/8 inch line
you would need and how big a bag you would need if the current is 3 mph?
When i dived the H.M.S Brittanic witch is at 400 feet we had currents of up to 4
mph. Big buoys of maybee 600 ib  lift got draged down to a depth of 70 feet.  I
do not think that your Jersey up line system would work here. You would need
lift
bags of  800ib and probably a thicker line than the 1/8  inch and it would have
to bee at least 800 feet long because the current will catch your huge bag on
the
way up.  It would bee pretty much impossible to swim around on the wreck with
all
this stupid gear.  We had CO2 problems from swiming at depth in currents as it
was already.  And to anchor on the wreck would bee hard because of the depth but
if you did and the anchor pulled during the dive you are pretty fucked if the
Jersey upline method fails.  And one other thing we could not carry all the gas
recuiered for the deco as it would bee pretty stupid to swim around on the wreck
with 3 deco bottles in a stiff current and add to that your gear of 800 feet of
line and a 800ib lift bag. We had to stage the oxygen for this reason.  In the
advent of not finding the line we had gas drop stations and several saftey diver
ready and 3 chase boats   Please enlighten me how you would do this with the
Jersey up line method.  Do you really think this is a good way?

>
>
> Capt.JT
>
> >
>
> --
> Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
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<HTML>
 

<P>Capt JT wrote:
<BLOCKQUOTE TYPE=CITE>>Thae way i deco when diving wrecks is this: 
First of all we never dive on
<BR>>the anchor line because it can pull off. We have always got a separate
line
<BR>>to the wreck that we do the descent/ascent from. This way we can never
lose
<BR>>the line.  This line is placed at a spot where it is easy to
locate for
<BR>>example on the port side of the bridge.

<P>Ok who is the lucky one that free dives on scuba down on a new wreck
that
<BR>is 300 to 400ft and finds this great spot for your ascent line then
sends
<BR>it up.Add current and low vis you get one XXXX up diver.
<BR> </BLOCKQUOTE>
<FONT COLOR="#000099">Ok Mr Messersmith.  The line i am talking about
is a shotline with a heavy weight.  The divers goes down cuts the
line from the weight and tie off to the wreck. Really complicated is it
not!  I am sure diving the anchor line is much better?.  If you
can not see the advantage with a separate ascent line you are clearly
stupid.</FONT>
<BLOCKQUOTE TYPE=CITE>>If  we cant find the line (which has never
happened) we inflate the bag
<BR>>approaching the first stop and lock the reel. Note that we do not
tie off
<BR>>the reel line to the wreck.  When the bag hits the surface it
will be in the
<BR>>area directly over  the wreck and the crew will spot it. 
If the boat is
<BR>>anchored the crew will simply put a buoy on the anchor line and drop
it and
<BR>>then start to chase the lift bag.

<P>Ok you lose the anchor and send up your bag ,the boat puts a buoy on
the
<BR>anchor and chases the free drifting diver.The free drifting divers
buddy
<BR>did not get lost or there is another team down that did not get lost
,you
<BR>now have divers decoing on a permanent line to the wreck while the
boat
<BR>goes after the lone dumb ass.YOU NOW HAVE DIVERS WITH NO SURFACE SUPPORT

<P>>No risk at all of losing the line because we do not dive on the anchor
line.

<P>No risk you say what about the ones that are left on the wreck? Who
is
<BR>going to help them should they need it if the boat is gone.
<BR>Do you really think this is a good way?Enlighten me
Please.</BLOCKQUOTE>
 

<P><FONT COLOR="#000099">If there is current we have a second boat, a
rib. 
We almost never have currents where i dive but when we do we use a second
boat.  I do not dive in  Jeresy and i am not trying to tell anybody
how to dive in your area. I am just telling you how we dive in our
conditions.</FONT>
<BR><FONT COLOR="#000099">The risk of not finding our line is almost non
exsitant as it is placed on a good spot. All the wrecks that are deep that
we dive are intact. If we place the line on the bow for example how are
you going to miss the line?  It is pretty basic to find the bow on
the ship is it not?  Infact in thosands of dives we have never missed
the line.  If we would miss the line we got it coverd with chase boats
on the surface.  I think this is a method that works good and it has
for years. Maybee it would not work in your area and i really do not care
either.</FONT>
<BR><FONT COLOR="#000099">Could you tell me if diving a 400 feet deep
wreck
how much of the 1/8 inch line you would need and how big a bag you would
need if the current is 3 mph?</FONT>
<BR><FONT COLOR="#000099">When i dived the H.M.S Brittanic witch is at
400 feet we had currents of up to 4 mph. Big buoys of maybee 600 ib 
lift got draged down to a depth of 70 feet.  I do not think that your
Jersey up line system would work here. You would need lift bags of 
800ib and probably a thicker line than the 1/8  inch and it would
have to bee at least 800 feet long because the current will catch your
huge bag on the way up.  It would bee pretty much impossible to swim
around on the wreck with all this stupid gear.  We had CO2 problems
from swiming at depth in currents as it was already.  And to anchor
on the wreck would bee hard because of the depth but if you did and the
anchor pulled during the dive you are pretty fucked if the Jersey upline
method fails.  And one other thing we could not carry all the gas
recuiered for the deco as it would bee pretty stupid to swim around on
the wreck with 3 deco bottles in a stiff current and add to that your gear
of 800 feet of line and a 800ib lift bag. We had to stage the oxygen for
this reason.  In the advent of not finding the line we had gas drop
stations and several saftey diver ready and 3 chase boats   Please
enlighten me how you would do this with the Jersey up line method. 
Do you really think this is a good way?</FONT>
<BLOCKQUOTE TYPE=CITE> 

<P>Capt.JT

<P>>

<P>--
<BR>Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'.
<BR>Send subscribe/unsubscribe requests to
`techdiver-request@aquanaut.com'.</BLOCKQUOTE>
 </HTML>

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